Well-drilling tool.



H. F. SCHUBERT.

WELL DRlLLING TOOL.

APPLICATION FILED SEPT.23, 191a.

Patented Jan. 2 1917.

ivy w w w a HERMANN F. SCHUBERT, OF VICTORIA, TEXAS.

WELL-DRILLING TOOL.

neiaeoa.

Specification of Letters Patent.

Patented Jan. 2, 1912.

Application filed September 23, 1916. Serial No. 121,816.

T 0 all whom it may concern:

Be it known that I, HERMANN F. SCHUBERT, a'citizen of the United States, and resident of Victoria, in the county of Victoria and State of Texas, have invented certain new and useful Improvements in Well-Drilling Tools, of which the following is a specification.

The present invention relates to well drilling tools and has particular reference to new and useful improvements in tools of this class for boring Artesian wells and the like, automatic means being associated with-the drill for engaging the material excavated t withdraw the same from the bore.

An object of my invention is to provide a novel and simple drilling device which is collapsible to engage the material excavated and withdraw the same from the bore.

Another object of my invention is to provide a drill of the class described which may be applied to anyof the standard types of drilling machines wherein the vertical reciprocation method is employed.

A further object of my invention is to provide a drill of the class described which is simple in construction, strong and durable, cheap to manufacture and install and eifective in operation.

'Other objects and advantages to be derived from the use of my improved well drilling tool 'will' appear from the following detail description and the claims, taken v with an inspection of the accompanying drawing, in which:

Figure 1 is a perspective View of a well drilling tool embodying the improvements of my invention; Fig. 2 is a vertical sectional view of the same; Fig. 3 is an enlarged detached perspective view of the jaw spreading member; and Fig. 4 is a detailed trans verse sectional view of one of the jaws showing the manner of connecting a return spring thereto.

Referring more particularly to the drawing, wherein similar characters of reference designate like and corresponding parts throughout the various views, 10 designates a drill rod, said drill rod having an enlargement 12 on the lower end thereof, said enlargement being formed with a recess 13 and a threaded opening 14, said opening comma-u nicating with said recess as best shown in Fig. 2. 1 provide a jaw carrying rod 15 having a threaded portion 16 for engagement with the threaded opening W said rod nection with the accompanying draw being ofiset as at 17 and formed with a tongue 18 to which is riveted or otherwise secured a jaw 19, said jaw being tapering in longitudinal configuration and semi-circular in cross section. A. second jaw 20 is provided substantially identical with the jaw 19 in contour, said jaw 20 being yieldably connected to the rod 15 by means of a fiat spring element 21, said fiat spring element being riveted to said rod and said jaw. The marginal edges of the jaw 20 are overlapped by the marginal edges of the jaw 19 as inclicated at 22. I provide means for spreading the jaws 19 and '20, said means including an arm 23 pivoted at 24: to the jaw 19. The free end ofthe arm 23 carries a transverse pin 23, on which is mounted an anti-friction roller 25 to engage the inner surface of the jaw 20. 'An actuating rod 26 formed of a strand of heavy wire is connected at 27 to the pin 23, said rod being formed with an off-set hook portion 28 to which one end of a coil spring 29 is connected. The lower end of the coil spring 29 is connected at 30 to a pin 31 permanently carried by the jaw 19. The upper free end ofthe rod 26 is laterally bent as at 32 and formed with a loop 33, said loop embracing the drill rod 10, a wear compensating washer 34 being disposed beneath the loop 33 and above the enlargement 12 to insure free even rotation of the drill rod.

In use the drill rod 10 is rotated to raise or lower the rod 26, the latter in turn oscillating the'arm 23 to bring the roller 25 into or out of engagement with the innersurface of the jaw 20 tending to force said -j aw away from or permit the same tomove' toward the jaw 19., The drill is preferably inserted into the bore with the jaws open and a slight turn given to the same in order to loosen the material to be excavated. The drill rod is now rotated to permit the jaws to collapse whereupon the material located between said jaws will be firmly gripped and be easily withdrawn from the bore.

1 desire to lay particular stress upon the extreme simplicityof my improved drilling tool as well as the facility with which the same may be nanipulated, also the-reduced cost at which the same maybe and the economic manner in which the is to be used.

From the above description taken in a a 153 it: clear comprehensive is that a understanding of the construction, operation and advantages of my invention may be had, and while I have shown and described the device as embodying a specific structure, I desire that it be understood that such changes may be made in said structure as do not depart from the spirit and scope of the, v invention as claimed.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent,is:-

1. A device as specified, including a drill rod having an enlargement on one free end thereof, a second rod adjustably associated with the drill rod, a rigid jaw'carried by said second rod, a second jaw yieldably carried by said second rod, and means interposed between said jaws-and connected with said drill rod to separate the jaws, at times. 2. A device as specified, including a drill rod having an enlargement on one end thereof, said enlargement beingprovided with a threaded bore, a second rod having a threaded portion engageable with said bore, a jaw carried by the lower free end of said second rod, a second jaw yi'eldably associated with said second rod, an actuating rod eX-' tending. from the drill'rod to a point between said jaws, and an arm carried by one of the jaws and connected with said actuating rod to spread the jaws when said drill rod and second rod are relatively moved, and a spring member connected with one of the I jaws and said actuating rod for the. pur- .p'ose specified.

3. device as specified, including a drill rod, said drill rod having an enlargement on one end thereof provided with a threaded bore, a second rod threaded to engage said bore, a jaw rigidly carried by the free end of-said second rod, a second jaw yieldably carried by said second rod, said first jaw embracing'said second jaw to form a tapering tubular-container, an actuating mecharod threaded to engage in said bore, a rigid jaw carried by the free end of said second rod, a yieldable jaw carried by said Second rod .to cooperate with said first jaw, an arm pivoted on said first jaw to engage said second jaw for separating the same, an ac-' tuating rod connected with said arm and with said drill rod, and spring means connected with one of said jaws and said actuating rod to move said arm when said drill and sald second rod are relatively moved whereby to expand or contract said aws.

In testimony whereof, I aflix my signature hereto.

\ HERMANN F. SCHUBERT. 

